On 1/1/2022 7:19 AM, Wayne Shumaker wrote:
At 1/1/2022 07:40 AM, I wrote:
. . .
I recommend reading Jim Kasson https://blog.kasson.com/lens-screening-testing/
There are links to test targets you can download and print. I printed one on
ledger size paper (11x17inch) and use it for testing. For example of one of my
tests at 100%:
Forgot to mention.
That was the sony 24-105 at 105/4, this is the CV 110 lens wide open
One sharp lens.
I'm in "I don't get it" land today. What do those shots tell me? It looks like, just when it should get interesting,
moire from the sensor happens. Is the lens really being tested?
One thing the HR mode on Oly µ4/3 bodies has shown me is that all the lenses I've tried it on simply out resolve the
16-20 MP Bayer array sensors. Ctein has said he feels that Bayer arrays lose about half the resolution of the image
projected on them. I've found that shooting identically in normal and HR mode, then downsizing the HR file to the sensor
size significantly improves detail, as well as other benefits. I think he's right.
What does the testing actually test?
And these shots me nothing about anything but the center. I guess one could mount multiple center sections on a board,
to cover different areas of the frame.
What if the Hokey Pokey *IS* what it's all about?
Themed Olympus Photo Exhibition: http://www.tope.nl/